secure-cookies: Allow to use secure HTTPS cookies (Django setting)

Cf https://docs.djangoproject.com/en/1.4/ref/settings/#std:setting-SESSION_COOKIE_SECURE
Make sure temporary course directory uses safe characters.
Add LMS Performance tests (TNL-484).
Only permit ascii characters in filenames generated from course_ids.
Fix typo in #5392 (encodeURICoponont)
Add the ability for Microsites to be able to send appropriately branded emails rather than the default system installed version

fix tests. Update Admin views/forms.

enforce uniqueness constraint in the Admin ModelForm submissions

Update bok_choy cached DBs with new schema changes

PR feedback
Fix unicode-related failures in CSV upload.

TNL-586
Merge pull request #5524 from edx/dan-f/fix-student-profile-csv-unicode-2

Fix unicode-related failures in CSV upload.
Don't show cohort information when disabled

TNL-552
Address code review comments
Minor cleanups
Adding new styles to the new donation button.
Changing the default value from 25.00 to 25
Use Backbone for student account and profile JS.

Validate student account and profile form fields. Use RequireJS for Jasmine tests of account and profile JS.
Pull Request comments addressed. Tests fixed.
Merge pull request #5523 from edx/hotfix/2014-10-08

Hotfix for 2014-10-08
Merge pull request #5496 from edx/oleg/lms-har-generate

Generate HAR Files for LMS
Forum shouldn't cuase error while searching unicode

If we use unicode character in the search of forum
it will cuase the error which is not the desired
behavior it should check and return result.

TNL-336
Merge pull request #5418 from mlkwaqas/waqas/tnl336-forum-search-unicode-error

Forum shouldn't cuase error while searching unicode
Merge pull request #5526 from edx/sanchez/style-donation-button

Adding new styles to the new donation button.